std:: hash <std::indirect>

Defined in header <memory>
template < class T, class Allocator > struct hash < std :: indirect < T, Allocator >> ;		(since C++26)

The partial specialization of std::hash for std::indirect allows users to obtain hashes of the objects owned by indirect objects.

The specialization std:: hash < std :: indirect < T, Allocator >> is enabled if std:: hash < T > is enabled, and is disabled otherwise.

When enabled, for an object obj of type std :: indirect < T, Allocator > , std:: hash < std :: indirect < T, Allocator >> ( ) ( obj ) evaluates to:

• std:: hash < T > ( ) ( * obj ) , if obj is not valueless .
• An implementation-defined value, if obj is valueless.

The member functions of this specialization are not guaranteed to be noexcept because the hash of T might throw.

Example

This section is incomplete Reason: no example

See also

hash (C++11)

hash function object (class template)